Coriandrum sativum
Coriander
Cornus capitata
Bentham's Dogwood
Cornus sanguinea
Dogwood
Corrigiola litoralis
Strapwort
Corydalis solida
Bird-in-a-bush
Corylus avellana
Hazel
Cosmos caudatus
King's Salad
Cosmos Sulphureus
Sulfur Cosmos
Costus guanaiensis
Spiral Ginger
Costus pictus
Painted Spiral Ginger
Cota tinctoria
Yellow Chamomile
Cotoneaster integrifolius
Entire-leaved Cotoneaster
Cotoneaster melanocarpus
Cotoneaster tomentosus
Cotoneaster (tomentosus)
Couroupita guianensis
Cannonball tree
Crambe maritima
Sea-kale
Crassocephalum crepidioides
Redflower Ragleaf
Crassula helmsii
New Zealand Pigmyweed
Crataegus laevigata
Midland Hawthorn
Crataegus monogyna
Hawthorn
Crepis biennis
Rough Hawk's-beard
Crepis capillaris
Smooth Hawk's-beard
Crepis foetida
Stinking Hawk's-beard
Crinum asiaticum
Crinum (asiaticum#var#japonicum)